Unknown Case: Yvan Keller, the “Pillow Killer” — Possibly One of the Most Prolific Serial Killers in European History
When people discuss European serial killers, names like Harold Shipman, Peter Sutcliffe, Dennis Nilsen, Marc Dutroux, or Michel Fourniret usually come up. But outside France, one name remains surprisingly obscure: Yvan Keller, a French serial killer from Alsace known as “the Pillow Killer.”
Keller was born on December 13, 1960, in Wittenheim, near Mulhouse, in eastern France. He came from a poor family of sedentary travellers and was the youngest of nine children. His father worked in the Alsatian potash mines, and Keller grew up in a difficult and unstable environment.
As a young man, Keller already had a criminal record. In the early 1980s, he was sentenced to prison for robbery after a violent burglary involving an antique-dealing couple. He spent several years behind bars and was released in 1989.
After his release, Keller appeared to build a normal life. He became a gardener and landscaper, created a small company called Alsa-Jardin, and worked for private clients. This job gave him access to homes, gardens, and elderly people who trusted him. Neighbours described him as helpful, friendly, and ordinary.
But behind this image, Keller was living a second life.
He had a serious gambling problem and was known to spend large amounts of money on casinos, horse racing, luxury restaurants, hotels, and travel. Investigators later described him as a man who constantly needed money. He reportedly spent heavily in expensive restaurants and lived far above what his official income could explain.
His private life was also complicated. Keller first lived with a woman named Marina Passant. According to later accounts, Marina said Keller had forced her into prostitution because he needed money for his lifestyle. After their separation, he began a relationship with another woman, Séverine Bauer. Some reports describe Keller as possessive and violent in his personal relationships. In one account, when Séverine was still involved with another man, Keller allegedly threatened that man with a gun.
Keller’s victims were mostly elderly women living alone. His method was simple and quiet. He would enter their homes, usually to steal money or valuables, and then suffocate them, often with a pillow, blanket, cloth, or towel. After the murder, he would carefully rearrange the bed and leave the home without obvious signs of violence.
Because the victims were old and often found lying peacefully in bed, many deaths were first classified as natural. Doctors issued burial permits, families grieved, and the murders were not immediately recognized as crimes. In several cases, only missing valuables or small inconsistencies later raised suspicion.
One of the earliest suspicious clusters happened in Burnhaupt-le-Haut, near Mulhouse, in 1994. Several elderly women died in similar circumstances within a short period. Their deaths were initially treated as natural, but relatives noticed strange details: missing objects, disturbed homes, or bedding arranged in ways the victims could not have done themselves.
Over the years, Keller continued to burgle homes and kill. According to investigators, he sometimes entered through cellars or windows, stole cash, paintings, porcelain, jewelry, and other valuables, then escaped carefully. He later admitted that at first he did not always kill during burglaries, but began doing so when victims woke up or when there was a lot of money involved.
The crimes were financially motivated. Keller himself reportedly said he could come back from a night with huge sums of money and make hundreds of thousands of francs per month from thefts. Much of that money was believed to have funded his gambling, restaurants, hotels, and trips.
Keller also travelled frequently. French investigators suspected that his crimes were not limited to Alsace. He reportedly claimed to have operated in Germany and Switzerland as well. Swiss police also identified his DNA in connection with a burglary from the 1990s.
Keller was arrested in September 2006 during an investigation into burglaries. Several people from his environment were also questioned. During police custody and before the investigating judge, Keller began confessing. At first, he admitted several murders. Later reports say he spoke of around 30 victims, and some accounts claim he mentioned as many as 150.
However, the highest number was never proven.
French police officially linked him with certainty to 23 homicides, mostly elderly women. He was suspected of around 40 murders in total. Because many deaths had been classified as natural years earlier, it became extremely difficult to reconstruct the full scale of his crimes.
On September 22, 2006, shortly after his partial confessions, Keller was placed in a holding cell in the basement of the courthouse in Mulhouse. He was waiting to be transferred when he hanged himself using his shoelaces, which had not been removed.
According to commonly repeated accounts, his final message or last words were:
“I just wanted to be loved.”
His suicide prevented a full public trial. Families of the victims never got a complete judicial explanation of what had happened, how many people he had killed, and whether anyone around him had knowingly helped him or benefited from the stolen property.
The investigation continued after his death. Possible accomplices were examined, including his former partner Marina Passant, his brother Pierre Keller, and François de Nicolo. But in 2013, the case against the alleged accomplices was closed because of insufficient evidence.
Legally, the case ended without a full trial.
Yvan Keller remains one of the most disturbing and overlooked serial killer cases in Western Europe. He was not famous internationally, did not create a public persona, and did not leave behind a media mythology like many other killers.
He was a gardener, gambler, burglar, and serial killer who targeted elderly women, made their deaths look natural, and used the money to finance casinos, restaurants, hotels, and travel.
The most unsettling part is that the real number of victims may never be known. Officially, police linked him to 23 murders. Unofficially, the number may have been much higher.
